What spark plugs to use??
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What spark plugs to use??
So what plugs does everyone use in there 502?? I switched my 96 502 from a mpi to a carb set up..so what plugs should I be using now?? Should I run the mpi plugs still or switch it over to the carbed plugs??
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I use the Rapid Fire 4's from AC Delco. Gapped them to .038-.040 if I remember right. They make a new version and an old version. Get the older version if you can. I went to Oreillys and they had 8 of each so they brought in another 16 and most were actually the old version so worked out good. NGK makes good plugs too. You'll be in the 7 heat range. If your from STL your only about 15 mins from me. Where you normally boat?
Last edited by Eliminated572; 08-13-2013 at 07:53 PM.
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I use the Rapid Fire 4's from AC Delco. Gapped them to .038-.040 if I remember right. They make a new version and an old version. Get the older version if you can. I went to Oreillys and they had 8 of each so they brought in another 16 and most were actually the old version so worked out good. NGK makes good plugs too. You'll be in the 7 heat range. If your from STL your only about 15 mins from me. Where you normally boat?
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NGK V Power racing plugs. Never had a problem with these plugs in a 650HP 502 with Dart Heads.